1997 Volvo Penta 3.0 Exhaust riser flap causing Milky Oil?

[Kronoss]

Hello iBoats,

Does anyone know if this serves a purpose ? it was just laying in my exhaust tube, not anchored to anything, just chilling, probably blocking the flow of water. My guess is that it is supposed to be seated in where it actually flaps, but it wasn't.

 

[dutch993]

Re: 1997 Volvo Penta 3.0 Exhaust riser flap (in exhaust tube, right after the riser)

Re: 1997 Volvo Penta 3.0 Exhaust riser flap (in exhaust tube, right after the riser)

These links may help:
http://forums.iboats.com/volvo-penta-i-o-inboard-gas-engines-outdrives/help-volvo-3-0-exhaust-riser-overheats-510558.html
http://forums.iboats.com/volvo-penta-i-o-inboard-gas-engines-outdrives/volvo-penta-exhaust-flapper-220898.html

 

[Kronoss]

Re: 1997 Volvo Penta 3.0 Exhaust riser flap (in exhaust tube, right after the riser)

Re: 1997 Volvo Penta 3.0 Exhaust riser flap (in exhaust tube, right after the riser)

Could this be the cause that i have water in my oil ? I also had a piece of impeller stuck in the thermostat entry where the hose connects.

I just got the boat, and it ran perfectly fine at idle for a long time, starting,going slow, but once I WOT, boat shutdown instantly, and I could not start it after.


Here are pictures while I took it apart, the engine seems new, remanufactured from 06/2011

Slideshow link with all pics: 1997 Four Winns WO

Youtube video with a detail look into the engine/valves: 1997 Volvo penta 3.0 - Water in oil and cylinders - looking for root cause - YouTube

 

[dypcdiver]

Re: 1997 Volvo Penta 3.0 Exhaust riser flap causing Milky Oil?

The flapper is too clean to have been in there any time. It is not original (Volvo didn't use stud iron (threaded rod) as a hinge pin. I'm sure you realise that the water in the oil has been getting in there via the valves and draining past the piston rings. My opinion is that the flapper has come adrift from where it should be and probably jammed in the exhaust causing a restriction. The exhaust cooling water (despite the jammed vane) has not been able to get past quickly enough and overflowed into the manifold and hence into the cylinders.

Regrettably you will most likely have rust in the cylinders by now, so only route is to pull the head, you might get away with honing the walls if the rust is not too deep. However whilst it is all apart you must get ALL the mating surfaces of the exhaust manifold and riser machined perfectly flat to ensure a good seal between them and the restrictor plate when reassembling.
The choice is yours to replace the flapper or not (Volvo decided not) but if you do you must get a SS rod that is the correct length so that it is unable to become dislodged again. Hurry now as the season is almost over and enjoy your boat.

 

[jerryjerry05]

Re: 1997 Volvo Penta 3.0 Exhaust riser flap causing Milky Oil?

That looks like you need new riser/manifold.
Someone/mechanic/owner didn't do the job right when they changed the impeller.
It didn't actually block off the flow completely.(good)
Do a compression test.
If it's low??Marvel Mystery Oil left in for a couple of days might help free the rings.
Running it might help too.After the MMO
Just make sure the valves haven't siezed before you try to turn it over.
Turning by hand slowly will tell if they are stuck.

 

[Walt T]

Re: 1997 Volvo Penta 3.0 Exhaust riser flap causing Milky Oil?

See the rust in the second from right head runner? Engine is toast.

 

[Kronoss]

Re: 1997 Volvo Penta 3.0 Exhaust riser flap causing Milky Oil?

I put some marvel mistery oil in the valve chambers and the cylinder chambers, I will let it soak there for a few days and then take the head off to inspect for further damage.

The engine is confirmed to be somewhat new, it was built in 06/2011, no wonder why it looks so good, i thought it was because it was fresh water only. The riser & manifold are from the old engine before that it seems.

Walt: Why do you say its toast? Its just rust. Couldn't I change the piston rings and be good ? or do you think the whole cylinder wall is rusted ?

 

[dypcdiver]

Re: 1997 Volvo Penta 3.0 Exhaust riser flap causing Milky Oil?

You won't know until you pull the head. As has been said a compression test will also give you a better idea. Chances are that with the water leaking past the rings it has probably rusted the bores on the way.

 

[jerryjerry05]

Re: 1997 Volvo Penta 3.0 Exhaust riser flap causing Milky Oil?

The rust might be in the head only???
The valves might have been closed when the water leaked down.
Again the comp test is needed.
Try turning the motor over by hand and see if the valves are moving.
I've fixed a lot of motors with rust intrusion.
MMO will help,so will trans fluid.
A friend had a 260Mercruiser.
The manifold went and water sat for a week in 2 cylinders.
They wanted to save as much $ as possible.
Luckily the valves weren't siezed and the MMO did it's job.
Started it up and the blow by was horrible.
I told em to run it up and down the river for a while.
By the end of the run the blow by was down by 75%
They used it the next day to fish.
Came back and the blow by was normal.The rings had free'd themselves.
Do what i suggested, don't remove the head until after you check the valves for movement and then if they work, do a compression test.
Good luck,J

 

[Walt T]

Re: 1997 Volvo Penta 3.0 Exhaust riser flap causing Milky Oil?

I'm betting there is cylinder damage but I've been wrong many times. Anybody wanna take my bet? What say we start a pool:

Motor is toast 3:1 odds

Head is toast: 25:1 odds

He has toast for breakfast: 1:1

He takes head off and drops it on his foot 60:1

Drops head on pinkie while lifting it off 15:1

Starts working on it after 4 beers 10:1

Throws a wrench and it hits dashboard smashing 2 gauges, bouncing off and hitting him in the head knocking him unconscious and he wakes up the following morning late for work 100:1

Wife says she spent all the money on shoes so no more boat stuff 35:1

Wife leaves him after he throws a wrench at her 1:1

His kid repeats all the stuff he heard and is sent home from school 2:1

He decides to wash his dirty boat work clothes in the washing machine leaving oil spots in it and wife ruins her favorite clothes washing them (hey I've done this one) 5:1

Junks boat 50:1

 

[dutch993]

Re: 1997 Volvo Penta 3.0 Exhaust riser flap causing Milky Oil?

i'm betting there is cylinder damage but i've been wrong many times. Anybody wanna take my bet? What say we start a pool:

Motor is toast 3:1 odds

head is toast: 25:1 odds

he has toast for breakfast: 1:1

he takes head off and drops it on his foot 60:1

drops head on pinkie while lifting it off 15:1

starts working on it after 4 beers 10:1

throws a wrench and it hits dashboard smashing 2 gauges, bouncing off and hitting him in the head knocking him unconscious and he wakes up the following morning late for work 100:1

wife says she spent all the money on shoes so no more boat stuff 35:1

wife leaves him after he throws a wrench at her 1:1

his kid repeats all the stuff he heard and is sent home from school 2:1

he decides to wash his dirty boat work clothes in the washing machine leaving oil spots in it and wife ruins her favorite clothes washing them (hey i've done this one) 5:1

junks boat 50:1

lol!!!!!!

 

[Maclin]

Re: 1997 Volvo Penta 3.0 Exhaust riser flap causing Milky Oil?

I'm betting there is cylinder damage but I've been wrong many times. Anybody wanna take my bet? What say we start a pool:

Motor is toast 3:1 odds

Head is toast: 25:1 odds

He has toast for breakfast: 1:1

He takes head off and drops it on his foot 60:1

Drops head on pinkie while lifting it off 15:1

Starts working on it after 4 beers 10:1

Throws a wrench and it hits dashboard smashing 2 gauges, bouncing off and hitting him in the head knocking him unconscious and he wakes up the following morning late for work 100:1

Wife says she spent all the money on shoes so no more boat stuff 35:1

Wife leaves him after he throws a wrench at her 1:1

His kid repeats all the stuff he heard and is sent home from school 2:1

He decides to wash his dirty boat work clothes in the washing machine leaving oil spots in it and wife ruins her favorite clothes washing them (hey I've done this one) 5:1

Junks boat 50:1

That is some Vintage Walt stuff right there, lol!

I will bet that it is one of those